Question

va rog dau 18 puncte si coroana va rog ​

Answer 1

Răspuns:

a)1/15

b)27/70

Explicație pas cu pas:

a)

2(4/5)*[2(7/10)*(20/63)-(14/15)/(1(3/25))]=

(14/5)*((27/10)*(20/63)-(14/15)/(28/25))=

(14/5)*((27/10)*(20/63)-(14/15)*(25/28))=

(14/5)*((27/10)*(20/63)-(14/15)*(25/28))=

(14/5)*(3*(2/7)-(14/15)*(25/28))=

(14/5)*((6/7)-(1/3)*(5/2))=

(14/5)*((6/7)-(5/6))=

(14/5)*(1/42)=

(1/5)*(1/3)=

1/15

b)((3/4)+(3/5))*(2/7)=

(27/20)*(2/7)=

(27/10)*(1/7)=

27/70

Answer 2

Răspuns:

Explicație pas cu pas: